X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fia32%2Fia32_emitter.c;h=34c75bb322cc186d66808e197a9f8525c1bd0406;hb=d0bb153368997acebe0339c165bec2ec3235581b;hp=53d7296ff87eab7828921955f8b35af6953eeb37;hpb=893a9141a398d8a8e9fa4fd6db8b3fbd4e2d55a5;p=libfirm

diff --git a/ir/be/ia32/ia32_emitter.c b/ir/be/ia32/ia32_emitter.c
index 53d7296ff..34c75bb32 100644
--- a/ir/be/ia32/ia32_emitter.c
+++ b/ir/be/ia32/ia32_emitter.c
@@ -23,9 +23,7 @@
  * @author      Christian Wuerdig, Matthias Braun
  * @version     $Id$
  */
-#ifdef HAVE_CONFIG_H
 #include "config.h"
-#endif
 
 #include <limits.h>
 
@@ -68,12 +66,12 @@ DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
 
 #define SNPRINTF_BUF_LEN 128
 
-static const arch_env_t *arch_env;
 static const ia32_isa_t *isa;
 static ia32_code_gen_t  *cg;
 static int               do_pic;
 static char              pic_base_label[128];
 static ir_label_t        exc_label_id;
+static int               mark_spill_reload = 0;
 
 /** Return the next block in Block schedule */
 static ir_node *get_prev_block_sched(const ir_node *block)
@@ -81,33 +79,33 @@ static ir_node *get_prev_block_sched(const ir_node *block)
 	return get_irn_link(block);
 }
 
-static bool is_fallthrough(const ir_node *cfgpred)
+static int is_fallthrough(const ir_node *cfgpred)
 {
 	ir_node *pred;
 
-	if(!is_Proj(cfgpred))
-		return true;
+	if (!is_Proj(cfgpred))
+		return 1;
 	pred = get_Proj_pred(cfgpred);
-	if(is_ia32_SwitchJmp(pred))
-		return false;
+	if (is_ia32_SwitchJmp(pred))
+		return 0;
 
-	return true;
+	return 1;
 }
 
-static bool block_needs_label(const ir_node *block)
+static int block_needs_label(const ir_node *block)
 {
-	bool need_label = true;
+	int need_label = 1;
 	int  n_cfgpreds = get_Block_n_cfgpreds(block);
 
 	if (n_cfgpreds == 0) {
-		need_label = false;
+		need_label = 0;
 	} else if (n_cfgpreds == 1) {
-		ir_node *cfgpred            = get_Block_cfgpred(block, 0);
-		ir_node *cfgpred_block      = get_nodes_block(cfgpred);
+		ir_node *cfgpred       = get_Block_cfgpred(block, 0);
+		ir_node *cfgpred_block = get_nodes_block(cfgpred);
 
 		if (get_prev_block_sched(block) == cfgpred_block
 				&& is_fallthrough(cfgpred)) {
-			need_label = false;
+			need_label = 0;
 		}
 	}
 
@@ -128,19 +126,16 @@ static const arch_register_t *get_in_reg(const ir_node *irn, int pos)
 	   in register we need. */
 	op = get_irn_n(irn, pos);
 
-	reg = arch_get_irn_register(arch_env, op);
+	reg = arch_get_irn_register(op);
 
 	assert(reg && "no in register found");
 
-	if(reg == &ia32_gp_regs[REG_GP_NOREG])
+	if (reg == &ia32_gp_regs[REG_GP_NOREG])
 		panic("trying to emit noreg for %+F input %d", irn, pos);
 
 	/* in case of unknown register: just return a valid register */
 	if (reg == &ia32_gp_regs[REG_GP_UKNWN]) {
-		const arch_register_req_t *req;
-
-		/* ask for the requirements */
-		req = arch_get_register_req(arch_env, irn, pos);
+		const arch_register_req_t *req = arch_get_register_req(irn, pos);
 
 		if (arch_register_req_is(req, limited)) {
 			/* in case of limited requirements: get the first allowed register */
@@ -170,7 +165,7 @@ static const arch_register_t *get_out_reg(const ir_node *irn, int pos)
 
 	if (get_irn_mode(irn) != mode_T) {
 		assert(pos == 0);
-		reg = arch_get_irn_register(arch_env, irn);
+		reg = arch_get_irn_register(irn);
 	} else if (is_ia32_irn(irn)) {
 		reg = get_ia32_out_reg(irn, pos);
 	} else {
@@ -180,7 +175,7 @@ static const arch_register_t *get_out_reg(const ir_node *irn, int pos)
 			proj = get_edge_src_irn(edge);
 			assert(is_Proj(proj) && "non-Proj from mode_T node");
 			if (get_Proj_proj(proj) == pos) {
-				reg = arch_get_irn_register(arch_env, proj);
+				reg = arch_get_irn_register(proj);
 				break;
 			}
 		}
@@ -232,17 +227,13 @@ static void emit_register(const arch_register_t *reg, const ir_mode *mode)
 {
 	const char *reg_name;
 
-	if(mode != NULL) {
+	if (mode != NULL) {
 		int size = get_mode_size_bits(mode);
-		if(size == 8) {
-			emit_8bit_register(reg);
-			return;
-		} else if(size == 16) {
-			emit_16bit_register(reg);
-			return;
-		} else {
-			assert(mode_is_float(mode) || size == 32);
+		switch (size) {
+			case  8: emit_8bit_register(reg);  return;
+			case 16: emit_16bit_register(reg); return;
 		}
+		assert(mode_is_float(mode) || size == 32);
 	}
 
 	reg_name = arch_register_get_name(reg);
@@ -253,18 +244,63 @@ static void emit_register(const arch_register_t *reg, const ir_mode *mode)
 
 void ia32_emit_source_register(const ir_node *node, int pos)
 {
-	const arch_register_t *reg      = get_in_reg(node, pos);
+	const arch_register_t *reg = get_in_reg(node, pos);
 
 	emit_register(reg, NULL);
 }
 
-static void emit_ia32_Immediate(const ir_node *node);
+static void ia32_emit_entity(ir_entity *entity, int no_pic_adjust)
+{
+	ident *id;
+
+	set_entity_backend_marked(entity, 1);
+	id = get_entity_ld_ident(entity);
+	be_emit_ident(id);
+
+	if (get_entity_owner(entity) == get_tls_type()) {
+		if (get_entity_visibility(entity) == visibility_external_allocated) {
+			be_emit_cstring("@INDNTPOFF");
+		} else {
+			be_emit_cstring("@NTPOFF");
+		}
+	}
+
+	if (!no_pic_adjust && do_pic) {
+		/* TODO: only do this when necessary */
+		be_emit_char('-');
+		be_emit_string(pic_base_label);
+	}
+}
+
+static void emit_ia32_Immediate_no_prefix(const ir_node *node)
+{
+	const ia32_immediate_attr_t *attr = get_ia32_immediate_attr_const(node);
+
+	if (attr->symconst != NULL) {
+		if (attr->sc_sign)
+			be_emit_char('-');
+		ia32_emit_entity(attr->symconst, 0);
+	}
+	if (attr->symconst == NULL || attr->offset != 0) {
+		if (attr->symconst != NULL) {
+			be_emit_irprintf("%+d", attr->offset);
+		} else {
+			be_emit_irprintf("0x%X", attr->offset);
+		}
+	}
+}
+
+static void emit_ia32_Immediate(const ir_node *node)
+{
+	be_emit_char('$');
+	emit_ia32_Immediate_no_prefix(node);
+}
 
 void ia32_emit_8bit_source_register_or_immediate(const ir_node *node, int pos)
 {
 	const arch_register_t *reg;
 	ir_node               *in = get_irn_n(node, pos);
-	if(is_ia32_Immediate(in)) {
+	if (is_ia32_Immediate(in)) {
 		emit_ia32_Immediate(in);
 		return;
 	}
@@ -298,31 +334,22 @@ void ia32_emit_x87_register(const ir_node *node, int pos)
 
 static void ia32_emit_mode_suffix_mode(const ir_mode *mode)
 {
-	if(mode_is_float(mode)) {
-		switch(get_mode_size_bits(mode)) {
-		case 32: be_emit_char('s'); return;
-		case 64: be_emit_char('l'); return;
-		case 80:
-		case 96: be_emit_char('t'); return;
-		}
-	} else {
-		assert(mode_is_int(mode) || mode_is_reference(mode));
-		switch(get_mode_size_bits(mode)) {
+	assert(mode_is_int(mode) || mode_is_reference(mode));
+	switch (get_mode_size_bits(mode)) {
+		case 8:  be_emit_char('b');     return;
+		case 16: be_emit_char('w');     return;
+		case 32: be_emit_char('l');     return;
+		/* gas docu says q is the suffix but gcc, objdump and icc use ll
+		 * apparently */
 		case 64: be_emit_cstring("ll"); return;
-				 /* gas docu says q is the suffix but gcc, objdump and icc use
-				 	ll apparently */
-		case 32: be_emit_char('l'); return;
-		case 16: be_emit_char('w'); return;
-		case 8:  be_emit_char('b'); return;
-		}
 	}
-	panic("Can't output mode_suffix for %+F\n", mode);
+	panic("Can't output mode_suffix for %+F", mode);
 }
 
 void ia32_emit_mode_suffix(const ir_node *node)
 {
 	ir_mode *mode = get_ia32_ls_mode(node);
-	if(mode == NULL)
+	if (mode == NULL)
 		mode = mode_Iu;
 
 	ia32_emit_mode_suffix_mode(mode);
@@ -330,26 +357,43 @@ void ia32_emit_mode_suffix(const ir_node *node)
 
 void ia32_emit_x87_mode_suffix(const ir_node *node)
 {
+	ir_mode *mode;
+
 	/* we only need to emit the mode on address mode */
-	if(get_ia32_op_type(node) != ia32_Normal) {
-		ir_mode *mode = get_ia32_ls_mode(node);
-		assert(mode != NULL);
-		ia32_emit_mode_suffix_mode(mode);
+	if (get_ia32_op_type(node) == ia32_Normal)
+		return;
+
+	mode = get_ia32_ls_mode(node);
+	assert(mode != NULL);
+
+	if (mode_is_float(mode)) {
+		switch (get_mode_size_bits(mode)) {
+			case 32: be_emit_char('s'); return;
+			case 64: be_emit_char('l'); return;
+			case 80:
+			case 96: be_emit_char('t'); return;
+		}
+	} else {
+		assert(mode_is_int(mode));
+		switch (get_mode_size_bits(mode)) {
+			case 16: be_emit_char('s');     return;
+			case 32: be_emit_char('l');     return;
+			/* gas docu says q is the suffix but gcc, objdump and icc use ll
+			 * apparently */
+			case 64: be_emit_cstring("ll"); return;
+		}
 	}
+	panic("Can't output mode_suffix for %+F", mode);
 }
 
 static char get_xmm_mode_suffix(ir_mode *mode)
 {
 	assert(mode_is_float(mode));
 	switch(get_mode_size_bits(mode)) {
-	case 32:
-		return 's';
-	case 64:
-		return 'd';
-	default:
-		assert(0);
+	case 32: return 's';
+	case 64: return 'd';
+	default: panic("Invalid XMM mode");
 	}
-	return '%';
 }
 
 void ia32_emit_xmm_mode_suffix(const ir_node *node)
@@ -369,19 +413,15 @@ void ia32_emit_xmm_mode_suffix_s(const ir_node *node)
 
 void ia32_emit_extend_suffix(const ir_mode *mode)
 {
-	if(get_mode_size_bits(mode) == 32)
+	if (get_mode_size_bits(mode) == 32)
 		return;
-	if(mode_is_signed(mode)) {
-		be_emit_char('s');
-	} else {
-		be_emit_char('z');
-	}
+	be_emit_char(mode_is_signed(mode) ? 's' : 'z');
 }
 
 void ia32_emit_source_register_or_immediate(const ir_node *node, int pos)
 {
 	ir_node *in = get_irn_n(node, pos);
-	if(is_ia32_Immediate(in)) {
+	if (is_ia32_Immediate(in)) {
 		emit_ia32_Immediate(in);
 	} else {
 		const ir_mode         *mode = get_ia32_ls_mode(node);
@@ -391,64 +431,311 @@ void ia32_emit_source_register_or_immediate(const ir_node *node, int pos)
 }
 
 /**
- * Emits registers and/or address mode of a binary operation.
+ * Returns the target block for a control flow node.
  */
-void ia32_emit_binop(const ir_node *node) {
-	const ir_node         *right_op  = get_irn_n(node, n_ia32_binary_right);
-	const ir_mode         *mode      = get_ia32_ls_mode(node);
-	const arch_register_t *reg_left;
+static ir_node *get_cfop_target_block(const ir_node *irn)
+{
+	assert(get_irn_mode(irn) == mode_X);
+	return get_irn_link(irn);
+}
 
-	switch(get_ia32_op_type(node)) {
-	case ia32_Normal:
-		reg_left = get_in_reg(node, n_ia32_binary_left);
-		if(is_ia32_Immediate(right_op)) {
-			emit_ia32_Immediate(right_op);
-			be_emit_cstring(", ");
-			emit_register(reg_left, mode);
+/**
+ * Emits a block label for the given block.
+ */
+static void ia32_emit_block_name(const ir_node *block)
+{
+	if (has_Block_label(block)) {
+		be_emit_string(be_gas_block_label_prefix());
+		be_emit_irprintf("%lu", get_Block_label(block));
+	} else {
+		be_emit_cstring(BLOCK_PREFIX);
+		be_emit_irprintf("%ld", get_irn_node_nr(block));
+	}
+}
+
+/**
+ * Emits the target label for a control flow node.
+ */
+static void ia32_emit_cfop_target(const ir_node *node)
+{
+	ir_node *block = get_cfop_target_block(node);
+	ia32_emit_block_name(block);
+}
+
+/*
+ * coding of conditions
+ */
+struct cmp2conditon_t {
+	const char *name;
+	int         num;
+};
+
+/*
+ * positive conditions for signed compares
+ */
+static const struct cmp2conditon_t cmp2condition_s[] = {
+	{ NULL,              pn_Cmp_False },  /* always false */
+	{ "e",               pn_Cmp_Eq },     /* == */
+	{ "l",               pn_Cmp_Lt },     /* < */
+	{ "le",              pn_Cmp_Le },     /* <= */
+	{ "g",               pn_Cmp_Gt },     /* > */
+	{ "ge",              pn_Cmp_Ge },     /* >= */
+	{ "ne",              pn_Cmp_Lg },     /* != */
+	{ NULL,              pn_Cmp_Leg},     /* always true */
+};
+
+/*
+ * positive conditions for unsigned compares
+ */
+static const struct cmp2conditon_t cmp2condition_u[] = {
+	{ NULL,              pn_Cmp_False },  /* always false */
+	{ "e",               pn_Cmp_Eq },     /* == */
+	{ "b",               pn_Cmp_Lt },     /* < */
+	{ "be",              pn_Cmp_Le },     /* <= */
+	{ "a",               pn_Cmp_Gt },     /* > */
+	{ "ae",              pn_Cmp_Ge },     /* >= */
+	{ "ne",              pn_Cmp_Lg },     /* != */
+	{ NULL,              pn_Cmp_Leg },   /* always true  */
+};
+
+static void ia32_emit_cmp_suffix(int pnc)
+{
+	const char *str;
+
+	if ((pnc & ia32_pn_Cmp_float) || (pnc & ia32_pn_Cmp_unsigned)) {
+		pnc = pnc & 7;
+		assert(cmp2condition_u[pnc].num == pnc);
+		str = cmp2condition_u[pnc].name;
+	} else {
+		pnc = pnc & 7;
+		assert(cmp2condition_s[pnc].num == pnc);
+		str = cmp2condition_s[pnc].name;
+	}
+
+	be_emit_string(str);
+}
+
+typedef enum ia32_emit_mod_t {
+	EMIT_RESPECT_LS   = 1U << 0,
+	EMIT_ALTERNATE_AM = 1U << 1
+} ia32_emit_mod_t;
+
+/**
+ * fmt  parameter               output
+ * ---- ----------------------  ---------------------------------------------
+ * %%                           %
+ * %AM  <node>                  address mode of the node
+ * %AR  const arch_register_t*  address mode of the node or register
+ * %ASx <node>                  address mode of the node or source register x
+ * %Dx  <node>                  destination register x
+ * %I   <node>                  immediate of the node
+ * %L   <node>                  control flow target of the node
+ * %M   <node>                  mode suffix of the node
+ * %P   int                     condition code
+ * %R   const arch_register_t*  register
+ * %Sx  <node>                  source register x
+ * %s   const char*             string
+ * %u   unsigned int            unsigned int
+ *
+ * x starts at 0
+ * # modifier for %ASx, %D and %S uses ls mode of node to alter register width
+ * * modifier does not prefix immediates with $, but AM with *
+ */
+static void ia32_emitf(const ir_node *node, const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+
+	for (;;) {
+		const char      *start = fmt;
+		ia32_emit_mod_t  mod   = 0;
+
+		while (*fmt != '%' && *fmt != '\n' && *fmt != '\0')
+			++fmt;
+		if (fmt != start) {
+			be_emit_string_len(start, fmt - start);
+		}
+
+		if (*fmt == '\n') {
+			be_emit_finish_line_gas(node);
+			++fmt;
+			if (*fmt == '\0')
+				break;
+			continue;
+		}
+
+		if (*fmt == '\0')
 			break;
-		} else {
-			const arch_register_t *reg_right
-				= get_in_reg(node, n_ia32_binary_right);
-			emit_register(reg_right, mode);
-			be_emit_cstring(", ");
-			emit_register(reg_left, mode);
+
+		++fmt;
+		if (*fmt == '*') {
+			mod |= EMIT_ALTERNATE_AM;
+			++fmt;
 		}
-		break;
-	case ia32_AddrModeS:
-		if(is_ia32_Immediate(right_op)) {
-			emit_ia32_Immediate(right_op);
-			be_emit_cstring(", ");
-			ia32_emit_am(node);
-		} else {
-			reg_left = get_in_reg(node, n_ia32_binary_left);
-			ia32_emit_am(node);
-			be_emit_cstring(", ");
-			emit_register(reg_left, mode);
+
+		if (*fmt == '#') {
+			mod |= EMIT_RESPECT_LS;
+			++fmt;
+		}
+
+		switch (*fmt++) {
+			case '%':
+				be_emit_char('%');
+				break;
+
+			case 'A': {
+				switch (*fmt++) {
+					case 'M':
+						if (mod & EMIT_ALTERNATE_AM)
+							be_emit_char('*');
+						ia32_emit_am(node);
+						break;
+
+					case 'R': {
+						const arch_register_t *reg = va_arg(ap, const arch_register_t*);
+						if (mod & EMIT_ALTERNATE_AM)
+							be_emit_char('*');
+						if (get_ia32_op_type(node) == ia32_AddrModeS) {
+							ia32_emit_am(node);
+						} else {
+							emit_register(reg, NULL);
+						}
+						break;
+					}
+
+					case 'S':
+						if (get_ia32_op_type(node) == ia32_AddrModeS) {
+							if (mod & EMIT_ALTERNATE_AM)
+								be_emit_char('*');
+							ia32_emit_am(node);
+							++fmt;
+						} else {
+							assert(get_ia32_op_type(node) == ia32_Normal);
+							goto emit_S;
+						}
+						break;
+
+					default: goto unknown;
+				}
+				break;
+			}
+
+			case 'D': {
+				unsigned               pos;
+				const arch_register_t *reg;
+
+				if (*fmt < '0' || '9' <= *fmt)
+					goto unknown;
+
+				pos = *fmt++ - '0';
+				reg = get_out_reg(node, pos);
+				emit_register(reg, mod & EMIT_RESPECT_LS ? get_ia32_ls_mode(node) : NULL);
+				break;
+			}
+
+			case 'I':
+				if (!(mod & EMIT_ALTERNATE_AM))
+					be_emit_char('$');
+				emit_ia32_Immediate_no_prefix(node);
+				break;
+
+			case 'L':
+				ia32_emit_cfop_target(node);
+				break;
+
+			case 'M': {
+				ia32_emit_mode_suffix_mode(get_ia32_ls_mode(node));
+				break;
+			}
+
+			case 'P': {
+				int pnc = va_arg(ap, int);
+				ia32_emit_cmp_suffix(pnc);
+				break;
+			}
+
+			case 'R': {
+				const arch_register_t *reg = va_arg(ap, const arch_register_t*);
+				emit_register(reg, NULL);
+				break;
+			}
+
+emit_S:
+			case 'S': {
+				unsigned       pos;
+				const ir_node *in;
+
+				if (*fmt < '0' || '9' <= *fmt)
+					goto unknown;
+
+				pos = *fmt++ - '0';
+				in  = get_irn_n(node, pos);
+				if (is_ia32_Immediate(in)) {
+					if (!(mod & EMIT_ALTERNATE_AM))
+						be_emit_char('$');
+					emit_ia32_Immediate_no_prefix(in);
+				} else {
+					const arch_register_t *reg;
+
+					if (mod & EMIT_ALTERNATE_AM)
+						be_emit_char('*');
+					reg = get_in_reg(node, pos);
+					emit_register(reg, mod & EMIT_RESPECT_LS ? get_ia32_ls_mode(node) : NULL);
+				}
+				break;
+			}
+
+			case 's': {
+				const char *str = va_arg(ap, const char*);
+				be_emit_string(str);
+				break;
+			}
+
+			case 'u': {
+				unsigned num = va_arg(ap, unsigned);
+				be_emit_irprintf("%u", num);
+				break;
+			}
+
+			default:
+unknown:
+				panic("unknown conversion");
 		}
-		break;
-	case ia32_AddrModeD:
-		panic("DestMode can't be output by %%binop anymore");
-		break;
-	default:
-		assert(0 && "unsupported op type");
 	}
+
+	va_end(ap);
 }
 
 /**
  * Emits registers and/or address mode of a binary operation.
  */
-void ia32_emit_x87_binop(const ir_node *node) {
+void ia32_emit_binop(const ir_node *node)
+{
+	if (is_ia32_Immediate(get_irn_n(node, n_ia32_binary_right))) {
+		ia32_emitf(node, "%#S4, %#AS3");
+	} else {
+		ia32_emitf(node, "%#AS4, %#S3");
+	}
+}
+
+/**
+ * Emits registers and/or address mode of a binary operation.
+ */
+void ia32_emit_x87_binop(const ir_node *node)
+{
 	switch(get_ia32_op_type(node)) {
 		case ia32_Normal:
 			{
 				const ia32_x87_attr_t *x87_attr = get_ia32_x87_attr_const(node);
 				const arch_register_t *in1      = x87_attr->x87[0];
-				const arch_register_t *in2      = x87_attr->x87[1];
+				const arch_register_t *in       = x87_attr->x87[1];
 				const arch_register_t *out      = x87_attr->x87[2];
-				const arch_register_t *in;
 
-				in  = out ? ((out == in2) ? in1 : in2) : in2;
-				out = out ? out : in1;
+				if (out == NULL) {
+					out = in1;
+				} else if (out == in) {
+					in = in1;
+				}
 
 				be_emit_char('%');
 				be_emit_string(arch_register_get_name(in));
@@ -468,59 +755,23 @@ void ia32_emit_x87_binop(const ir_node *node) {
 /**
  * Emits registers and/or address mode of a unary operation.
  */
-void ia32_emit_unop(const ir_node *node, int pos) {
-	const ir_node *op;
-
-	switch(get_ia32_op_type(node)) {
-	case ia32_Normal:
-		op = get_irn_n(node, pos);
-		if (is_ia32_Immediate(op)) {
-			emit_ia32_Immediate(op);
-		} else {
-			ia32_emit_source_register(node, pos);
-		}
-		break;
-	case ia32_AddrModeS:
-	case ia32_AddrModeD:
-		ia32_emit_am(node);
-		break;
-	default:
-		assert(0 && "unsupported op type");
-	}
-}
-
-static void ia32_emit_entity(ir_entity *entity, int no_pic_adjust)
+void ia32_emit_unop(const ir_node *node, int pos)
 {
-	ident *id;
-
-	set_entity_backend_marked(entity, 1);
-	id = get_entity_ld_ident(entity);
-	be_emit_ident(id);
-
-	if (get_entity_owner(entity) == get_tls_type()) {
-		if (get_entity_visibility(entity) == visibility_external_allocated) {
-			be_emit_cstring("@INDNTPOFF");
-		} else {
-			be_emit_cstring("@NTPOFF");
-		}
-	}
-
-	if (!no_pic_adjust && do_pic) {
-		/* TODO: only do this when necessary */
-		be_emit_char('-');
-		be_emit_string(pic_base_label);
-	}
+	char fmt[] = "%ASx";
+	fmt[3] = '0' + pos;
+	ia32_emitf(node, fmt);
 }
 
 /**
  * Emits address mode.
  */
-void ia32_emit_am(const ir_node *node) {
+void ia32_emit_am(const ir_node *node)
+{
 	ir_entity *ent       = get_ia32_am_sc(node);
 	int        offs      = get_ia32_am_offs_int(node);
-	ir_node   *base      = get_irn_n(node, 0);
+	ir_node   *base      = get_irn_n(node, n_ia32_base);
 	int        has_base  = !is_ia32_NoReg_GP(base);
-	ir_node   *index     = get_irn_n(node, 1);
+	ir_node   *index     = get_irn_n(node, n_ia32_index);
 	int        has_index = !is_ia32_NoReg_GP(index);
 
 	/* just to be sure... */
@@ -533,8 +784,9 @@ void ia32_emit_am(const ir_node *node) {
 		ia32_emit_entity(ent, 0);
 	}
 
-	if(offs != 0) {
-		if(ent != NULL) {
+	/* also handle special case if nothing is set */
+	if (offs != 0 || (ent == NULL && !has_base && !has_index)) {
+		if (ent != NULL) {
 			be_emit_irprintf("%+d", offs);
 		} else {
 			be_emit_irprintf("%d", offs);
@@ -559,16 +811,11 @@ void ia32_emit_am(const ir_node *node) {
 
 			scale = get_ia32_am_scale(node);
 			if (scale > 0) {
-				be_emit_irprintf(",%d", 1 << get_ia32_am_scale(node));
+				be_emit_irprintf(",%d", 1 << scale);
 			}
 		}
 		be_emit_char(')');
 	}
-
-	/* special case if nothing is set */
-	if(ent == NULL && offs == 0 && !has_base && !has_index) {
-		be_emit_char('0');
-	}
 }
 
 static void emit_ia32_IMul(const ir_node *node)
@@ -576,110 +823,55 @@ static void emit_ia32_IMul(const ir_node *node)
 	ir_node               *left    = get_irn_n(node, n_ia32_IMul_left);
 	const arch_register_t *out_reg = get_out_reg(node, pn_ia32_IMul_res);
 
-	be_emit_cstring("\timul");
-	ia32_emit_mode_suffix(node);
-	be_emit_char(' ');
-
-	ia32_emit_binop(node);
-
 	/* do we need the 3-address form? */
-	if(is_ia32_NoReg_GP(left) ||
+	if (is_ia32_NoReg_GP(left) ||
 			get_in_reg(node, n_ia32_IMul_left) != out_reg) {
-		be_emit_cstring(", ");
-		emit_register(out_reg, get_ia32_ls_mode(node));
+		ia32_emitf(node, "\timul%M %#S4, %#AS3, %#D0\n");
+	} else {
+		ia32_emitf(node, "\timul%M %#AS4, %#S3\n");
 	}
-	be_emit_finish_line_gas(node);
 }
 
-/*************************************************
- *                 _ _                         _
- *                (_) |                       | |
- *   ___ _ __ ___  _| |_    ___ ___  _ __   __| |
- *  / _ \ '_ ` _ \| | __|  / __/ _ \| '_ \ / _` |
- * |  __/ | | | | | | |_  | (_| (_) | | | | (_| |
- *  \___|_| |_| |_|_|\__|  \___\___/|_| |_|\__,_|
- *
- *************************************************/
-
-#undef IA32_DO_EMIT
-#define IA32_DO_EMIT(irn) ia32_fprintf_format(F, irn, cmd_buf, cmnt_buf)
-
-/*
- * coding of conditions
- */
-struct cmp2conditon_t {
-	const char *name;
-	int         num;
-};
-
-/*
- * positive conditions for signed compares
- */
-static const struct cmp2conditon_t cmp2condition_s[] = {
-	{ NULL,              pn_Cmp_False },  /* always false */
-	{ "e",               pn_Cmp_Eq },     /* == */
-	{ "l",               pn_Cmp_Lt },     /* < */
-	{ "le",              pn_Cmp_Le },     /* <= */
-	{ "g",               pn_Cmp_Gt },     /* > */
-	{ "ge",              pn_Cmp_Ge },     /* >= */
-	{ "ne",              pn_Cmp_Lg },     /* != */
-	{ NULL,              pn_Cmp_Leg},     /* always true */
-};
-
-/*
- * positive conditions for unsigned compares
- */
-static const struct cmp2conditon_t cmp2condition_u[] = {
-	{ NULL,              pn_Cmp_False },  /* always false */
-	{ "e",               pn_Cmp_Eq },     /* == */
-	{ "b",               pn_Cmp_Lt },     /* < */
-	{ "be",              pn_Cmp_Le },     /* <= */
-	{ "a",               pn_Cmp_Gt },     /* > */
-	{ "ae",              pn_Cmp_Ge },     /* >= */
-	{ "ne",              pn_Cmp_Lg },     /* != */
-	{ NULL,              pn_Cmp_Leg },   /* always true  */
-};
-
 /**
  * walks up a tree of copies/perms/spills/reloads to find the original value
  * that is moved around
  */
 static ir_node *find_original_value(ir_node *node)
 {
-	inc_irg_visited(current_ir_graph);
-	while(1) {
-		mark_irn_visited(node);
-		if(be_is_Copy(node)) {
-			node = be_get_Copy_op(node);
-		} else if(be_is_CopyKeep(node)) {
-			node = be_get_CopyKeep_op(node);
-		} else if(is_Proj(node)) {
-			ir_node *pred = get_Proj_pred(node);
-			if(be_is_Perm(pred)) {
-				node = get_irn_n(pred, get_Proj_proj(node));
-			} else if(be_is_MemPerm(pred)) {
-				node = get_irn_n(pred, get_Proj_proj(node) + 1);
-			} else if(is_ia32_Load(pred)) {
-				node = get_irn_n(pred, n_ia32_Load_mem);
-			} else {
-				return node;
-			}
-		} else if(is_ia32_Store(node)) {
-			node = get_irn_n(node, n_ia32_Store_val);
-		} else if(is_Phi(node)) {
-			int i, arity;
-			arity = get_irn_arity(node);
-			for(i = 0; i < arity; ++i) {
-				ir_node *in = get_irn_n(node, i);
-				if(irn_visited(in))
-					continue;
-				node = in;
-				break;
-			}
-			assert(i < arity);
+	if (irn_visited(node))
+		return NULL;
+
+	mark_irn_visited(node);
+	if (be_is_Copy(node)) {
+		return find_original_value(be_get_Copy_op(node));
+	} else if (be_is_CopyKeep(node)) {
+		return find_original_value(be_get_CopyKeep_op(node));
+	} else if (is_Proj(node)) {
+		ir_node *pred = get_Proj_pred(node);
+		if (be_is_Perm(pred)) {
+			return find_original_value(get_irn_n(pred, get_Proj_proj(node)));
+		} else if (be_is_MemPerm(pred)) {
+			return find_original_value(get_irn_n(pred, get_Proj_proj(node) + 1));
+		} else if (is_ia32_Load(pred)) {
+			return find_original_value(get_irn_n(pred, n_ia32_Load_mem));
 		} else {
 			return node;
 		}
+	} else if (is_ia32_Store(node)) {
+		return find_original_value(get_irn_n(node, n_ia32_Store_val));
+	} else if (is_Phi(node)) {
+		int i, arity;
+		arity = get_irn_arity(node);
+		for (i = 0; i < arity; ++i) {
+			ir_node *in  = get_irn_n(node, i);
+			ir_node *res = find_original_value(in);
+
+			if (res != NULL)
+				return res;
+		}
+		return NULL;
+	} else {
+		return node;
 	}
 }
 
@@ -690,59 +882,40 @@ static int determine_final_pnc(const ir_node *node, int flags_pos,
 	const ia32_attr_t *flags_attr;
 	flags = skip_Proj(flags);
 
-	if(is_ia32_Sahf(flags)) {
+	if (is_ia32_Sahf(flags)) {
 		ir_node *cmp = get_irn_n(flags, n_ia32_Sahf_val);
-		if(!(is_ia32_FucomFnstsw(cmp) || is_ia32_FucompFnstsw(cmp)
+		if (!(is_ia32_FucomFnstsw(cmp) || is_ia32_FucompFnstsw(cmp)
 				|| is_ia32_FucomppFnstsw(cmp) || is_ia32_FtstFnstsw(cmp))) {
+			inc_irg_visited(current_ir_graph);
 			cmp = find_original_value(cmp);
+			assert(cmp != NULL);
 			assert(is_ia32_FucomFnstsw(cmp) || is_ia32_FucompFnstsw(cmp)
 			       || is_ia32_FucomppFnstsw(cmp) || is_ia32_FtstFnstsw(cmp));
 		}
 
 		flags_attr = get_ia32_attr_const(cmp);
-		if(flags_attr->data.ins_permuted)
+		if (flags_attr->data.ins_permuted)
 			pnc = get_mirrored_pnc(pnc);
 		pnc |= ia32_pn_Cmp_float;
-	} else if(is_ia32_Ucomi(flags) || is_ia32_Fucomi(flags)
+	} else if (is_ia32_Ucomi(flags) || is_ia32_Fucomi(flags)
 			|| is_ia32_Fucompi(flags)) {
 		flags_attr = get_ia32_attr_const(flags);
 
-		if(flags_attr->data.ins_permuted)
+		if (flags_attr->data.ins_permuted)
 			pnc = get_mirrored_pnc(pnc);
 		pnc |= ia32_pn_Cmp_float;
 	} else {
-#if 0
-		assert(is_ia32_Cmp(flags) || is_ia32_Test(flags)
-				|| is_ia32_Cmp8Bit(flags) || is_ia32_Test8Bit(flags));
-#endif
 		flags_attr = get_ia32_attr_const(flags);
 
-		if(flags_attr->data.ins_permuted)
+		if (flags_attr->data.ins_permuted)
 			pnc = get_mirrored_pnc(pnc);
-		if(flags_attr->data.cmp_unsigned)
+		if (flags_attr->data.cmp_unsigned)
 			pnc |= ia32_pn_Cmp_unsigned;
 	}
 
 	return pnc;
 }
 
-static void ia32_emit_cmp_suffix(int pnc)
-{
-	const char        *str;
-
-	if((pnc & ia32_pn_Cmp_float) || (pnc & ia32_pn_Cmp_unsigned)) {
-		pnc = pnc & 7;
-		assert(cmp2condition_u[pnc].num == pnc);
-		str = cmp2condition_u[pnc].name;
-	} else {
-		pnc = pnc & 7;
-		assert(cmp2condition_s[pnc].num == pnc);
-		str = cmp2condition_s[pnc].name;
-	}
-
-	be_emit_string(str);
-}
-
 void ia32_emit_cmp_suffix_node(const ir_node *node,
                                int flags_pos)
 {
@@ -751,8 +924,8 @@ void ia32_emit_cmp_suffix_node(const ir_node *node,
 	pn_Cmp pnc = get_ia32_condcode(node);
 
 	pnc = determine_final_pnc(node, flags_pos, pnc);
-	if(attr->data.ins_permuted) {
-		if(pnc & ia32_pn_Cmp_float) {
+	if (attr->data.ins_permuted) {
+		if (pnc & ia32_pn_Cmp_float) {
 			pnc = get_negated_pnc(pnc, mode_F);
 		} else {
 			pnc = get_negated_pnc(pnc, mode_Iu);
@@ -762,28 +935,6 @@ void ia32_emit_cmp_suffix_node(const ir_node *node,
 	ia32_emit_cmp_suffix(pnc);
 }
 
-/**
- * Returns the target block for a control flow node.
- */
-static ir_node *get_cfop_target_block(const ir_node *irn) {
-	assert(get_irn_mode(irn) == mode_X);
-	return get_irn_link(irn);
-}
-
-/**
- * Emits a block label for the given block.
- */
-static void ia32_emit_block_name(const ir_node *block)
-{
-	if (has_Block_label(block)) {
-		be_emit_string(be_gas_block_label_prefix());
-		be_emit_irprintf("%lu", get_Block_label(block));
-	} else {
-		be_emit_cstring(BLOCK_PREFIX);
-		be_emit_irprintf("%ld", get_irn_node_nr(block));
-	}
-}
-
 /**
  * Emits an exception label for a given node.
  */
@@ -793,20 +944,11 @@ static void ia32_emit_exc_label(const ir_node *node)
 	be_emit_irprintf("%lu", get_ia32_exc_label_id(node));
 }
 
-/**
- * Emits the target label for a control flow node.
- */
-static void ia32_emit_cfop_target(const ir_node *node)
-{
-	ir_node *block = get_cfop_target_block(node);
-
-	ia32_emit_block_name(block);
-}
-
 /**
  * Returns the Proj with projection number proj and NOT mode_M
  */
-static ir_node *get_proj(const ir_node *node, long proj) {
+static ir_node *get_proj(const ir_node *node, long proj)
+{
 	const ir_edge_t *edge;
 	ir_node         *src;
 
@@ -825,7 +967,7 @@ static ir_node *get_proj(const ir_node *node, long proj) {
 	return NULL;
 }
 
-static bool can_be_fallthrough(const ir_node *node)
+static int can_be_fallthrough(const ir_node *node)
 {
 	ir_node *target_block = get_cfop_target_block(node);
 	ir_node *block        = get_nodes_block(node);
@@ -841,7 +983,6 @@ static void emit_ia32_Jcc(const ir_node *node)
 	const ir_node *proj_true;
 	const ir_node *proj_false;
 	const ir_node *block;
-	const ir_node *next_block;
 	pn_Cmp         pnc = get_ia32_condcode(node);
 
 	pnc = determine_final_pnc(node, 0, pnc);
@@ -861,7 +1002,7 @@ static void emit_ia32_Jcc(const ir_node *node)
 
 		proj_true  = proj_false;
 		proj_false = t;
-		if(pnc & ia32_pn_Cmp_float) {
+		if (pnc & ia32_pn_Cmp_float) {
 			pnc = get_negated_pnc(pnc, mode_F);
 		} else {
 			pnc = get_negated_pnc(pnc, mode_Iu);
@@ -873,16 +1014,12 @@ static void emit_ia32_Jcc(const ir_node *node)
 		 * which indicates that the result is unordered */
 		switch (pnc & 15) {
 			case pn_Cmp_Uo: {
-				be_emit_cstring("\tjp ");
-				ia32_emit_cfop_target(proj_true);
-				be_emit_finish_line_gas(proj_true);
+				ia32_emitf(proj_true, "\tjp %L\n");
 				break;
 			}
 
 			case pn_Cmp_Leg:
-				be_emit_cstring("\tjnp ");
-				ia32_emit_cfop_target(proj_true);
-				be_emit_finish_line_gas(proj_true);
+				ia32_emitf(proj_true, "\tjnp %L\n");
 				break;
 
 			case pn_Cmp_Eq:
@@ -890,22 +1027,18 @@ static void emit_ia32_Jcc(const ir_node *node)
 			case pn_Cmp_Le:
 				/* we need a local label if the false proj is a fallthrough
 				 * as the falseblock might have no label emitted then */
-				if (get_cfop_target_block(proj_false) == next_block) {
+				if (can_be_fallthrough(proj_false)) {
 					need_parity_label = 1;
-					be_emit_cstring("\tjp 1f");
+					ia32_emitf(proj_false, "\tjp 1f\n");
 				} else {
-					be_emit_cstring("\tjp ");
-					ia32_emit_cfop_target(proj_false);
+					ia32_emitf(proj_false, "\tjp %L\n");
 				}
-				be_emit_finish_line_gas(proj_false);
 				goto emit_jcc;
 
 			case pn_Cmp_Ug:
 			case pn_Cmp_Uge:
 			case pn_Cmp_Ne:
-				be_emit_cstring("\tjp ");
-				ia32_emit_cfop_target(proj_true);
-				be_emit_finish_line_gas(proj_true);
+				ia32_emitf(proj_true, "\tjp %L\n");
 				goto emit_jcc;
 
 			default:
@@ -913,28 +1046,18 @@ static void emit_ia32_Jcc(const ir_node *node)
 		}
 	} else {
 emit_jcc:
-		be_emit_cstring("\tj");
-		ia32_emit_cmp_suffix(pnc);
-		be_emit_char(' ');
-		ia32_emit_cfop_target(proj_true);
-		be_emit_finish_line_gas(proj_true);
+		ia32_emitf(proj_true, "\tj%P %L\n", pnc);
 	}
 
-	if(need_parity_label) {
-		be_emit_cstring("1:");
-		be_emit_write_line();
+	if (need_parity_label) {
+		ia32_emitf(NULL, "1:\n");
 	}
 
 	/* the second Proj might be a fallthrough */
-	if (get_cfop_target_block(proj_false) != next_block) {
-		be_emit_cstring("\tjmp ");
-		ia32_emit_cfop_target(proj_false);
-		be_emit_finish_line_gas(proj_false);
+	if (can_be_fallthrough(proj_false)) {
+		ia32_emitf(proj_false, "\t/* fallthrough to %L */\n");
 	} else {
-		be_emit_cstring("\t/* fallthrough to ");
-		ia32_emit_cfop_target(proj_false);
-		be_emit_cstring(" */");
-		be_emit_finish_line_gas(proj_false);
+		ia32_emitf(proj_false, "\tjmp %L\n");
 	}
 }
 
@@ -942,22 +1065,20 @@ static void emit_ia32_CMov(const ir_node *node)
 {
 	const ia32_attr_t     *attr         = get_ia32_attr_const(node);
 	int                    ins_permuted = attr->data.ins_permuted;
-	const arch_register_t *out          = arch_get_irn_register(arch_env, node);
+	const arch_register_t *out          = arch_get_irn_register(node);
 	pn_Cmp                 pnc          = get_ia32_condcode(node);
 	const arch_register_t *in_true;
 	const arch_register_t *in_false;
 
 	pnc = determine_final_pnc(node, n_ia32_CMov_eflags, pnc);
 
-	in_true  = arch_get_irn_register(arch_env,
-	                                 get_irn_n(node, n_ia32_CMov_val_true));
-	in_false = arch_get_irn_register(arch_env,
-	                                 get_irn_n(node, n_ia32_CMov_val_false));
+	in_true  = arch_get_irn_register(get_irn_n(node, n_ia32_CMov_val_true));
+	in_false = arch_get_irn_register(get_irn_n(node, n_ia32_CMov_val_false));
 
 	/* should be same constraint fullfilled? */
-	if(out == in_false) {
+	if (out == in_false) {
 		/* yes -> nothing to do */
-	} else if(out == in_true) {
+	} else if (out == in_true) {
 		const arch_register_t *tmp;
 
 		assert(get_ia32_op_type(node) == ia32_Normal);
@@ -969,15 +1090,11 @@ static void emit_ia32_CMov(const ir_node *node)
 		in_false = tmp;
 	} else {
 		/* we need a mov */
-		be_emit_cstring("\tmovl ");
-		emit_register(in_false, NULL);
-		be_emit_cstring(", ");
-		emit_register(out, NULL);
-		be_emit_finish_line_gas(node);
+		ia32_emitf(node, "\tmovl %R, %R\n", in_false, out);
 	}
 
-	if(ins_permuted) {
-		if(pnc & ia32_pn_Cmp_float) {
+	if (ins_permuted) {
+		if (pnc & ia32_pn_Cmp_float) {
 			pnc = get_negated_pnc(pnc, mode_F);
 		} else {
 			pnc = get_negated_pnc(pnc, mode_Iu);
@@ -986,17 +1103,7 @@ static void emit_ia32_CMov(const ir_node *node)
 
 	/* TODO: handling of Nans isn't correct yet */
 
-	be_emit_cstring("\tcmov");
-	ia32_emit_cmp_suffix(pnc);
-	be_emit_char(' ');
-	if(get_ia32_op_type(node) == ia32_AddrModeS) {
-		ia32_emit_am(node);
-	} else {
-		emit_register(in_true, get_ia32_ls_mode(node));
-	}
-	be_emit_cstring(", ");
-	emit_register(out, get_ia32_ls_mode(node));
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node, "\tcmov%P %AR, %#R\n", pnc, in_true, out);
 }
 
 /*********************************************************
@@ -1029,7 +1136,8 @@ typedef struct _jmp_tbl_t {
 /**
  * Compare two variables of type branch_t. Used to sort all switch cases
  */
-static int ia32_cmp_branch_t(const void *a, const void *b) {
+static int ia32_cmp_branch_t(const void *a, const void *b)
+{
 	branch_t *b1 = (branch_t *)a;
 	branch_t *b2 = (branch_t *)b;
 
@@ -1055,11 +1163,11 @@ static void emit_ia32_SwitchJmp(const ir_node *node)
 	const ir_edge_t    *edge;
 
 	/* fill the table structure */
-	tbl.label        = xmalloc(SNPRINTF_BUF_LEN);
+	tbl.label        = XMALLOCN(char, SNPRINTF_BUF_LEN);
 	tbl.label        = get_unique_label(tbl.label, SNPRINTF_BUF_LEN, ".TBL_");
 	tbl.defProj      = NULL;
 	tbl.num_branches = get_irn_n_edges(node) - 1;
-	tbl.branches     = xcalloc(tbl.num_branches, sizeof(tbl.branches[0]));
+	tbl.branches     = XMALLOCNZ(branch_t, tbl.num_branches);
 	tbl.min_value    = INT_MAX;
 	tbl.max_value    = INT_MIN;
 
@@ -1096,53 +1204,30 @@ static void emit_ia32_SwitchJmp(const ir_node *node)
 	interval = tbl.max_value - tbl.min_value;
 
 	/* emit the table */
-	be_emit_cstring("\tcmpl $");
-	be_emit_irprintf("%u, ", interval);
-	ia32_emit_source_register(node, 0);
-	be_emit_finish_line_gas(node);
-
-	be_emit_cstring("\tja ");
-	ia32_emit_cfop_target(tbl.defProj);
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node,        "\tcmpl $%u, %S0\n", interval);
+	ia32_emitf(tbl.defProj, "\tja %L\n");
 
 	if (tbl.num_branches > 1) {
 		/* create table */
-		be_emit_cstring("\tjmp *");
-		be_emit_string(tbl.label);
-		be_emit_cstring("(,");
-		ia32_emit_source_register(node, 0);
-		be_emit_cstring(",4)");
-		be_emit_finish_line_gas(node);
+		ia32_emitf(node, "\tjmp *%s(,%S0,4)\n", tbl.label);
 
 		be_gas_emit_switch_section(GAS_SECTION_RODATA);
-		be_emit_cstring("\t.align 4\n");
-		be_emit_write_line();
-
-		be_emit_string(tbl.label);
-		be_emit_cstring(":\n");
-		be_emit_write_line();
-
-		be_emit_cstring(".long ");
-		ia32_emit_cfop_target(tbl.branches[0].target);
-		be_emit_finish_line_gas(NULL);
+		ia32_emitf(NULL, "\t.align 4\n");
+		ia32_emitf(NULL, "%s:\n", tbl.label);
 
 		last_value = tbl.branches[0].value;
-		for (i = 1; i < tbl.num_branches; ++i) {
-			while (++last_value < tbl.branches[i].value) {
-				be_emit_cstring(".long ");
-				ia32_emit_cfop_target(tbl.defProj);
-				be_emit_finish_line_gas(NULL);
+		for (i = 0; i != tbl.num_branches; ++i) {
+			while (last_value != tbl.branches[i].value) {
+				ia32_emitf(tbl.defProj, ".long %L\n");
+				++last_value;
 			}
-			be_emit_cstring(".long ");
-			ia32_emit_cfop_target(tbl.branches[i].target);
-			be_emit_finish_line_gas(NULL);
+			ia32_emitf(tbl.branches[i].target, ".long %L\n");
+			++last_value;
 		}
 		be_gas_emit_switch_section(GAS_SECTION_TEXT);
 	} else {
 		/* one jump is enough */
-		be_emit_cstring("\tjmp ");
-		ia32_emit_cfop_target(tbl.branches[0].target);
-		be_emit_finish_line_gas(node);
+		ia32_emitf(tbl.branches[0].target, "\tjmp %L\n");
 	}
 
 	if (tbl.label)
@@ -1163,32 +1248,9 @@ static void emit_Jmp(const ir_node *node)
 
 	/* we have a block schedule */
 	if (can_be_fallthrough(node)) {
-		be_emit_cstring("\t/* fallthrough to ");
-		ia32_emit_cfop_target(node);
-		be_emit_cstring(" */");
+		ia32_emitf(node, "\t/* fallthrough to %L */\n");
 	} else {
-		be_emit_cstring("\tjmp ");
-		ia32_emit_cfop_target(node);
-	}
-	be_emit_finish_line_gas(node);
-}
-
-static void emit_ia32_Immediate(const ir_node *node)
-{
-	const ia32_immediate_attr_t *attr = get_ia32_immediate_attr_const(node);
-
-	be_emit_char('$');
-	if(attr->symconst != NULL) {
-		if(attr->sc_sign)
-			be_emit_char('-');
-		ia32_emit_entity(attr->symconst, 0);
-	}
-	if(attr->symconst == NULL || attr->offset != 0) {
-		if(attr->symconst != NULL) {
-			be_emit_irprintf("%+d", attr->offset);
-		} else {
-			be_emit_irprintf("0x%X", attr->offset);
-		}
+		ia32_emitf(node, "\tjmp %L\n");
 	}
 }
 
@@ -1252,7 +1314,7 @@ static const char* emit_asm_operand(const ir_node *node, const char *s)
 
 	/* parse number */
 	sscanf(s, "%d%n", &num, &p);
-	if(num < 0) {
+	if (num < 0) {
 		ir_fprintf(stderr, "Warning: Couldn't parse assembler operand (%+F)\n",
 		           node);
 		return s;
@@ -1260,7 +1322,7 @@ static const char* emit_asm_operand(const ir_node *node, const char *s)
 		s += p;
 	}
 
-	if(num < 0 || num >= ARR_LEN(asm_regs)) {
+	if (num < 0 || num >= ARR_LEN(asm_regs)) {
 		ir_fprintf(stderr, "Error: Custom assembler references invalid "
 		           "input/output (%+F)\n", node);
 		return s;
@@ -1269,30 +1331,30 @@ static const char* emit_asm_operand(const ir_node *node, const char *s)
 	assert(asm_reg->valid);
 
 	/* get register */
-	if(asm_reg->use_input == 0) {
+	if (asm_reg->use_input == 0) {
 		reg = get_out_reg(node, asm_reg->inout_pos);
 	} else {
 		ir_node *pred = get_irn_n(node, asm_reg->inout_pos);
 
 		/* might be an immediate value */
-		if(is_ia32_Immediate(pred)) {
+		if (is_ia32_Immediate(pred)) {
 			emit_ia32_Immediate(pred);
 			return s;
 		}
 		reg = get_in_reg(node, asm_reg->inout_pos);
 	}
-	if(reg == NULL) {
+	if (reg == NULL) {
 		ir_fprintf(stderr, "Warning: no register assigned for %d asm op "
 		           "(%+F)\n", num, node);
 		return s;
 	}
 
-	if(asm_reg->memory) {
+	if (asm_reg->memory) {
 		be_emit_char('(');
 	}
 
 	/* emit it */
-	if(modifier != 0) {
+	if (modifier != 0) {
 		be_emit_char('%');
 		switch(modifier) {
 		case 'b':
@@ -1312,7 +1374,7 @@ static const char* emit_asm_operand(const ir_node *node, const char *s)
 		emit_register(reg, asm_reg->mode);
 	}
 
-	if(asm_reg->memory) {
+	if (asm_reg->memory) {
 		be_emit_char(')');
 	}
 
@@ -1330,27 +1392,20 @@ static void emit_ia32_Asm(const ir_node *node)
 	ident                 *asm_text = attr->asm_text;
 	const char            *s        = get_id_str(asm_text);
 
-	be_emit_cstring("# Begin ASM \t");
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node, "#APP\t\n");
 
 	if (s[0] != '\t')
 		be_emit_char('\t');
 
 	while(*s != 0) {
-		if(*s == '%') {
+		if (*s == '%') {
 			s = emit_asm_operand(node, s);
-			continue;
 		} else {
-			be_emit_char(*s);
+			be_emit_char(*s++);
 		}
-		++s;
 	}
 
-	be_emit_char('\n');
-	be_emit_write_line();
-
-	be_emit_cstring("# End ASM\n");
-	be_emit_write_line();
+	ia32_emitf(NULL, "\n#NO_APP\n");
 }
 
 /**********************************
@@ -1367,26 +1422,12 @@ static void emit_ia32_Asm(const ir_node *node)
 /**
  * Emit movsb/w instructions to make mov count divideable by 4
  */
-static void emit_CopyB_prolog(unsigned size) {
-	be_emit_cstring("\tcld");
-	be_emit_finish_line_gas(NULL);
-
-	switch (size) {
-	case 1:
-		be_emit_cstring("\tmovsb");
-		be_emit_finish_line_gas(NULL);
-		break;
-	case 2:
-		be_emit_cstring("\tmovsw");
-		be_emit_finish_line_gas(NULL);
-		break;
-	case 3:
-		be_emit_cstring("\tmovsb");
-		be_emit_finish_line_gas(NULL);
-		be_emit_cstring("\tmovsw");
-		be_emit_finish_line_gas(NULL);
-		break;
-	}
+static void emit_CopyB_prolog(unsigned size)
+{
+	if (size & 1)
+		ia32_emitf(NULL, "\tmovsb\n");
+	if (size & 2)
+		ia32_emitf(NULL, "\tmovsw\n");
 }
 
 /**
@@ -1397,9 +1438,7 @@ static void emit_ia32_CopyB(const ir_node *node)
 	unsigned size = get_ia32_copyb_size(node);
 
 	emit_CopyB_prolog(size);
-
-	be_emit_cstring("\trep movsd");
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node, "\trep movsd\n");
 }
 
 /**
@@ -1409,12 +1448,11 @@ static void emit_ia32_CopyB_i(const ir_node *node)
 {
 	unsigned size = get_ia32_copyb_size(node);
 
-	emit_CopyB_prolog(size & 0x3);
+	emit_CopyB_prolog(size);
 
 	size >>= 2;
 	while (size--) {
-		be_emit_cstring("\tmovsd");
-		be_emit_finish_line_gas(NULL);
+		ia32_emitf(NULL, "\tmovsd\n");
 	}
 }
 
@@ -1437,44 +1475,30 @@ static void emit_ia32_Conv_with_FP(const ir_node *node)
 {
 	ir_mode            *ls_mode = get_ia32_ls_mode(node);
 	int                 ls_bits = get_mode_size_bits(ls_mode);
+	const char         *conv;
 
-	be_emit_cstring("\tcvt");
-
-	if(is_ia32_Conv_I2FP(node)) {
-		if(ls_bits == 32) {
-			be_emit_cstring("si2ss");
+	if (is_ia32_Conv_I2FP(node)) {
+		if (ls_bits == 32) {
+			conv = "si2ss";
 		} else {
-			be_emit_cstring("si2sd");
+			conv = "si2sd";
 		}
-	} else if(is_ia32_Conv_FP2I(node)) {
-		if(ls_bits == 32) {
-			be_emit_cstring("ss2si");
+	} else if (is_ia32_Conv_FP2I(node)) {
+		if (ls_bits == 32) {
+			conv = "ss2si";
 		} else {
-			be_emit_cstring("sd2si");
+			conv = "sd2si";
 		}
 	} else {
 		assert(is_ia32_Conv_FP2FP(node));
-		if(ls_bits == 32) {
-			be_emit_cstring("sd2ss");
+		if (ls_bits == 32) {
+			conv = "sd2ss";
 		} else {
-			be_emit_cstring("ss2sd");
+			conv = "ss2sd";
 		}
 	}
-	be_emit_char(' ');
 
-	switch(get_ia32_op_type(node)) {
-		case ia32_Normal:
-			ia32_emit_source_register(node, n_ia32_unary_op);
-			break;
-		case ia32_AddrModeS:
-			ia32_emit_am(node);
-			break;
-		default:
-			assert(0 && "unsupported op type for Conv");
-	}
-	be_emit_cstring(", ");
-	ia32_emit_dest_register(node, 0);
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node, "\tcvt%s %AS3, %D0\n", conv);
 }
 
 static void emit_ia32_Conv_I2FP(const ir_node *node)
@@ -1497,56 +1521,34 @@ static void emit_ia32_Conv_FP2FP(const ir_node *node)
  */
 static void emit_ia32_Conv_I2I(const ir_node *node)
 {
-	const char            *sign_suffix;
-	ir_mode               *smaller_mode = get_ia32_ls_mode(node);
-	int                    smaller_bits = get_mode_size_bits(smaller_mode);
-	int                    signed_mode;
-	const arch_register_t *in_reg, *out_reg;
+	ir_mode *smaller_mode = get_ia32_ls_mode(node);
+	int      smaller_bits = get_mode_size_bits(smaller_mode);
+	int      signed_mode  = mode_is_signed(smaller_mode);
 
 	assert(!mode_is_float(smaller_mode));
 	assert(smaller_bits == 8 || smaller_bits == 16);
 
-	signed_mode = mode_is_signed(smaller_mode);
-	sign_suffix = signed_mode ? "s" : "z";
-
-	out_reg = get_out_reg(node, 0);
-
-	switch(get_ia32_op_type(node)) {
-		case ia32_Normal:
-			in_reg  = get_in_reg(node, n_ia32_unary_op);
-
-			if (in_reg  == &ia32_gp_regs[REG_EAX] &&
-				out_reg == &ia32_gp_regs[REG_EAX] &&
-				signed_mode &&
-				smaller_bits == 16)
-			{
-				/* argument and result are both in EAX and */
-				/* signedness is ok: -> use the smaller cwtl opcode */
-				be_emit_cstring("\tcwtl");
-			} else {
-				be_emit_cstring("\tmov");
-				be_emit_string(sign_suffix);
-				ia32_emit_mode_suffix_mode(smaller_mode);
-				be_emit_cstring("l ");
-				emit_register(in_reg, smaller_mode);
-				be_emit_cstring(", ");
-				emit_register(out_reg, NULL);
-			}
-			break;
-		case ia32_AddrModeS: {
-			be_emit_cstring("\tmov");
-			be_emit_string(sign_suffix);
-			ia32_emit_mode_suffix_mode(smaller_mode);
-			be_emit_cstring("l ");
-			ia32_emit_am(node);
-			be_emit_cstring(", ");
-			emit_register(out_reg, NULL);
-			break;
-		}
-		default:
-			assert(0 && "unsupported op type for Conv");
+	if (signed_mode                                    &&
+			smaller_bits == 16                             &&
+			&ia32_gp_regs[REG_EAX] == get_out_reg(node, 0) &&
+			&ia32_gp_regs[REG_EAX] == arch_get_irn_register(get_irn_n(node, n_ia32_unary_op))) {
+		/* argument and result are both in EAX and signedness is ok: use the
+		 * smaller cwtl opcode */
+		ia32_emitf(node, "\tcwtl\n");
+	} else {
+		const char *sign_suffix = signed_mode ? "s" : "z";
+		ia32_emitf(node, "\tmov%s%Ml %#AS3, %D0\n", sign_suffix);
 	}
-	be_emit_finish_line_gas(node);
+}
+
+/**
+ * Emits a call
+ */
+static void emit_ia32_Call(const ir_node *node)
+{
+	/* Special case: Call must not have its immediates prefixed by $, instead
+	 * address mode is prefixed by *. */
+	ia32_emitf(node, "\tcall %*AS3\n");
 }
 
 
@@ -1560,45 +1562,21 @@ static void emit_ia32_Conv_I2I(const ir_node *node)
  *
  *******************************************/
 
-/**
- * Emits a backend call
- */
-static void emit_be_Call(const ir_node *node)
-{
-	ir_entity *ent = be_Call_get_entity(node);
-
-	be_emit_cstring("\tcall ");
-	if (ent) {
-		ia32_emit_entity(ent, 1);
-	} else {
-		const arch_register_t *reg = get_in_reg(node, be_pos_Call_ptr);
-		be_emit_char('*');
-		emit_register(reg, NULL);
-	}
-	be_emit_finish_line_gas(node);
-}
-
 /**
  * Emits code to increase stack pointer.
  */
 static void emit_be_IncSP(const ir_node *node)
 {
-	int                    offs = be_get_IncSP_offset(node);
-	const arch_register_t *reg  = arch_get_irn_register(arch_env, node);
+	int offs = be_get_IncSP_offset(node);
 
 	if (offs == 0)
 		return;
 
 	if (offs > 0) {
-		be_emit_cstring("\tsubl $");
-		be_emit_irprintf("%u, ", offs);
-		emit_register(reg, NULL);
+		ia32_emitf(node, "\tsubl $%u, %D0\n", offs);
 	} else {
-		be_emit_cstring("\taddl $");
-		be_emit_irprintf("%u, ", -offs);
-		emit_register(reg, NULL);
+		ia32_emitf(node, "\taddl $%u, %D0\n", -offs);
 	}
-	be_emit_finish_line_gas(node);
 }
 
 /**
@@ -1606,32 +1584,23 @@ static void emit_be_IncSP(const ir_node *node)
  */
 static void Copy_emitter(const ir_node *node, const ir_node *op)
 {
-	const arch_register_t *in  = arch_get_irn_register(arch_env, op);
-	const arch_register_t *out = arch_get_irn_register(arch_env, node);
-	ir_mode               *mode;
+	const arch_register_t *in  = arch_get_irn_register(op);
+	const arch_register_t *out = arch_get_irn_register(node);
 
-	if(in == out) {
+	if (in == out) {
 		return;
 	}
-	if(is_unknown_reg(in))
+	if (is_unknown_reg(in))
 		return;
 	/* copies of vf nodes aren't real... */
-	if(arch_register_get_class(in) == &ia32_reg_classes[CLASS_ia32_vfp])
+	if (arch_register_get_class(in) == &ia32_reg_classes[CLASS_ia32_vfp])
 		return;
 
-	mode = get_irn_mode(node);
-	if (mode == mode_E) {
-		be_emit_cstring("\tmovsd ");
-		emit_register(in, NULL);
-		be_emit_cstring(", ");
-		emit_register(out, NULL);
+	if (get_irn_mode(node) == mode_E) {
+		ia32_emitf(node, "\tmovsd %R, %R\n", in, out);
 	} else {
-		be_emit_cstring("\tmovl ");
-		emit_register(in, NULL);
-		be_emit_cstring(", ");
-		emit_register(out, NULL);
+		ia32_emitf(node, "\tmovl %R, %R\n", in, out);
 	}
-	be_emit_finish_line_gas(node);
 }
 
 static void emit_be_Copy(const ir_node *node)
@@ -1652,8 +1621,8 @@ static void emit_be_Perm(const ir_node *node)
 	const arch_register_t *in0, *in1;
 	const arch_register_class_t *cls0, *cls1;
 
-	in0 = arch_get_irn_register(arch_env, get_irn_n(node, 0));
-	in1 = arch_get_irn_register(arch_env, get_irn_n(node, 1));
+	in0 = arch_get_irn_register(get_irn_n(node, 0));
+	in1 = arch_get_irn_register(get_irn_n(node, 1));
 
 	cls0 = arch_register_get_class(in0);
 	cls1 = arch_register_get_class(in1);
@@ -1661,35 +1630,17 @@ static void emit_be_Perm(const ir_node *node)
 	assert(cls0 == cls1 && "Register class mismatch at Perm");
 
 	if (cls0 == &ia32_reg_classes[CLASS_ia32_gp]) {
-		be_emit_cstring("\txchg ");
-		emit_register(in1, NULL);
-		be_emit_cstring(", ");
-		emit_register(in0, NULL);
-		be_emit_finish_line_gas(node);
+		ia32_emitf(node, "\txchg %R, %R\n", in1, in0);
 	} else if (cls0 == &ia32_reg_classes[CLASS_ia32_xmm]) {
-		be_emit_cstring("\txorpd ");
-		emit_register(in1, NULL);
-		be_emit_cstring(", ");
-		emit_register(in0, NULL);
-		be_emit_finish_line_gas(NULL);
-
-		be_emit_cstring("\txorpd ");
-		emit_register(in0, NULL);
-		be_emit_cstring(", ");
-		emit_register(in1, NULL);
-		be_emit_finish_line_gas(NULL);
-
-		be_emit_cstring("\txorpd ");
-		emit_register(in1, NULL);
-		be_emit_cstring(", ");
-		emit_register(in0, NULL);
-		be_emit_finish_line_gas(node);
+		ia32_emitf(NULL, "\txorpd %R, %R\n", in1, in0);
+		ia32_emitf(NULL, "\txorpd %R, %R\n", in0, in1);
+		ia32_emitf(node, "\txorpd %R, %R\n", in1, in0);
 	} else if (cls0 == &ia32_reg_classes[CLASS_ia32_vfp]) {
 		/* is a NOP */
 	} else if (cls0 == &ia32_reg_classes[CLASS_ia32_st]) {
 		/* is a NOP */
 	} else {
-		panic("unexpected register class in be_Perm (%+F)\n", node);
+		panic("unexpected register class in be_Perm (%+F)", node);
 	}
 }
 
@@ -1698,12 +1649,7 @@ static void emit_be_Perm(const ir_node *node)
  */
 static void emit_ia32_Const(const ir_node *node)
 {
-	be_emit_cstring("\tmovl ");
-	emit_ia32_Immediate(node);
-	be_emit_cstring(", ");
-	ia32_emit_dest_register(node, 0);
-
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node, "\tmovl %I, %D0\n");
 }
 
 /**
@@ -1711,65 +1657,43 @@ static void emit_ia32_Const(const ir_node *node)
  */
 static void emit_ia32_LdTls(const ir_node *node)
 {
-	be_emit_cstring("\tmovl %gs:0, ");
-	ia32_emit_dest_register(node, 0);
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node, "\tmovl %%gs:0, %D0\n");
 }
 
 /* helper function for emit_ia32_Minus64Bit */
 static void emit_mov(const ir_node* node, const arch_register_t *src, const arch_register_t *dst)
 {
-	be_emit_cstring("\tmovl ");
-	emit_register(src, NULL);
-	be_emit_cstring(", ");
-	emit_register(dst, NULL);
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node, "\tmovl %R, %R\n", src, dst);
 }
 
 /* helper function for emit_ia32_Minus64Bit */
 static void emit_neg(const ir_node* node, const arch_register_t *reg)
 {
-	be_emit_cstring("\tnegl ");
-	emit_register(reg, NULL);
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node, "\tnegl %R\n", reg);
 }
 
 /* helper function for emit_ia32_Minus64Bit */
 static void emit_sbb0(const ir_node* node, const arch_register_t *reg)
 {
-	be_emit_cstring("\tsbbl $0, ");
-	emit_register(reg, NULL);
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node, "\tsbbl $0, %R\n", reg);
 }
 
 /* helper function for emit_ia32_Minus64Bit */
 static void emit_sbb(const ir_node* node, const arch_register_t *src, const arch_register_t *dst)
 {
-	be_emit_cstring("\tsbbl ");
-	emit_register(src, NULL);
-	be_emit_cstring(", ");
-	emit_register(dst, NULL);
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node, "\tsbbl %R, %R\n", src, dst);
 }
 
 /* helper function for emit_ia32_Minus64Bit */
 static void emit_xchg(const ir_node* node, const arch_register_t *src, const arch_register_t *dst)
 {
-	be_emit_cstring("\txchgl ");
-	emit_register(src, NULL);
-	be_emit_cstring(", ");
-	emit_register(dst, NULL);
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node, "\txchgl %R, %R\n", src, dst);
 }
 
 /* helper function for emit_ia32_Minus64Bit */
 static void emit_zero(const ir_node* node, const arch_register_t *reg)
 {
-	be_emit_cstring("\txorl ");
-	emit_register(reg, NULL);
-	be_emit_cstring(", ");
-	emit_register(reg, NULL);
-	be_emit_finish_line_gas(node);
+	ia32_emitf(node, "\txorl %R, %R\n", reg, reg);
 }
 
 static void emit_ia32_Minus64Bit(const ir_node *node)
@@ -1828,35 +1752,20 @@ zero_neg:
 
 static void emit_ia32_GetEIP(const ir_node *node)
 {
-	be_emit_cstring("\tcall ");
-	be_emit_string(pic_base_label);
-	be_emit_finish_line_gas(node);
-
-	be_emit_string(pic_base_label);
-	be_emit_cstring(":\n");
-	be_emit_write_line();
-
-	be_emit_cstring("\tpopl ");
-	ia32_emit_dest_register(node, 0);
-	be_emit_char('\n');
-	be_emit_write_line();
+	ia32_emitf(node, "\tcall %s\n", pic_base_label);
+	ia32_emitf(NULL, "%s:\n", pic_base_label);
+	ia32_emitf(node, "\tpopl %D0\n");
 }
 
 static void emit_be_Return(const ir_node *node)
 {
-	unsigned pop;
-	be_emit_cstring("\tret");
+	unsigned pop = be_Return_get_pop(node);
 
-	pop = be_Return_get_pop(node);
-	if (pop > 0) {
-		be_emit_irprintf(" $%d", pop);
-	} else if (be_Return_get_emit_pop(node)) {
-		ir_node *block = get_nodes_block(node);
-		if (block_needs_label(block)) {
-			be_emit_cstring(" $0");
-		}
+	if (pop > 0 || be_Return_get_emit_pop(node)) {
+		ia32_emitf(node, "\tret $%u\n", pop);
+	} else {
+		ia32_emitf(node, "\tret\n");
 	}
-	be_emit_finish_line_gas(node);
 }
 
 static void emit_Nothing(const ir_node *node)
@@ -1879,8 +1788,8 @@ static void emit_Nothing(const ir_node *node)
  * Enters the emitter functions for handled nodes into the generic
  * pointer of an opcode.
  */
-static void ia32_register_emitters(void) {
-
+static void ia32_register_emitters(void)
+{
 #define IA32_EMIT2(a,b) op_ia32_##a->ops.generic = (op_func)emit_ia32_##b
 #define IA32_EMIT(a)    IA32_EMIT2(a,a)
 #define EMIT(a)         op_##a->ops.generic = (op_func)emit_##a
@@ -1895,38 +1804,37 @@ static void ia32_register_emitters(void) {
 	ia32_register_spec_emitters();
 
 	/* other ia32 emitter functions */
+	IA32_EMIT2(Conv_I2I8Bit, Conv_I2I);
 	IA32_EMIT(Asm);
 	IA32_EMIT(CMov);
-	IA32_EMIT(IMul);
-	IA32_EMIT(SwitchJmp);
-	IA32_EMIT(CopyB);
-	IA32_EMIT(CopyB_i);
-	IA32_EMIT(Conv_I2FP);
-	IA32_EMIT(Conv_FP2I);
+	IA32_EMIT(Call);
+	IA32_EMIT(Const);
 	IA32_EMIT(Conv_FP2FP);
+	IA32_EMIT(Conv_FP2I);
+	IA32_EMIT(Conv_I2FP);
 	IA32_EMIT(Conv_I2I);
-	IA32_EMIT2(Conv_I2I8Bit, Conv_I2I);
-	IA32_EMIT(Const);
+	IA32_EMIT(CopyB);
+	IA32_EMIT(CopyB_i);
+	IA32_EMIT(GetEIP);
+	IA32_EMIT(IMul);
+	IA32_EMIT(Jcc);
 	IA32_EMIT(LdTls);
 	IA32_EMIT(Minus64Bit);
-	IA32_EMIT(Jcc);
-	IA32_EMIT(GetEIP);
+	IA32_EMIT(SwitchJmp);
 
 	/* benode emitter */
-	BE_EMIT(Call);
-	BE_EMIT(IncSP);
 	BE_EMIT(Copy);
 	BE_EMIT(CopyKeep);
+	BE_EMIT(IncSP);
 	BE_EMIT(Perm);
 	BE_EMIT(Return);
 
-	BE_IGN(RegParams);
 	BE_IGN(Barrier);
 	BE_IGN(Keep);
+	BE_IGN(RegParams);
 
 	/* firm emitter */
 	EMIT(Jmp);
-	IGN(Proj);
 	IGN(Phi);
 	IGN(Start);
 
@@ -1939,6 +1847,23 @@ static void ia32_register_emitters(void) {
 
 typedef void (*emit_func_ptr) (const ir_node *);
 
+/**
+ * Assign and emit an exception label if the current instruction can fail.
+ */
+static void ia32_assign_exc_label(ir_node *node)
+{
+	/* assign a new ID to the instruction */
+	set_ia32_exc_label_id(node, ++exc_label_id);
+	/* print it */
+	ia32_emit_exc_label(node);
+	be_emit_char(':');
+	be_emit_pad_comment();
+	be_emit_cstring("/* exception to Block ");
+	ia32_emit_cfop_target(node);
+	be_emit_cstring(" */\n");
+	be_emit_write_line();
+}
+
 /**
  * Emits code for a node.
  */
@@ -1948,9 +1873,22 @@ static void ia32_emit_node(ir_node *node)
 
 	DBG((dbg, LEVEL_1, "emitting code for %+F\n", node));
 
-	if (is_ia32_irn(node) && get_ia32_exc_label(node)) {
-		/* emit the exception label of this instruction */
-		ia32_assign_exc_label(node);
+	if (is_ia32_irn(node)) {
+		if (get_ia32_exc_label(node)) {
+			/* emit the exception label of this instruction */
+			ia32_assign_exc_label(node);
+		}
+		if (mark_spill_reload) {
+			if (is_ia32_is_spill(node)) {
+				ia32_emitf(NULL, "\txchg %ebx, %ebx        /* spill mark */\n");
+			}
+			if (is_ia32_is_reload(node)) {
+				ia32_emitf(NULL, "\txchg %edx, %edx        /* reload mark */\n");
+			}
+			if (is_ia32_is_remat(node)) {
+				ia32_emitf(NULL, "\txchg %ecx, %ecx        /* remat mark */\n");
+			}
+		}
 	}
 	if (op->ops.generic) {
 		emit_func_ptr func = (emit_func_ptr) op->ops.generic;
@@ -1970,9 +1908,7 @@ static void ia32_emit_node(ir_node *node)
  */
 static void ia32_emit_alignment(unsigned align, unsigned skip)
 {
-	be_emit_cstring("\t.p2align ");
-	be_emit_irprintf("%u,,%u\n", align, skip);
-	be_emit_write_line();
+	ia32_emitf(NULL, "\t.p2align %u,,%u\n", align, skip);
 }
 
 /**
@@ -2001,28 +1937,28 @@ static int should_align_block(const ir_node *block)
 	double        jmp_freq  = 0;  /**< execfreq of all non-fallthrough blocks */
 	int           i, n_cfgpreds;
 
-	if(exec_freq == NULL)
+	if (exec_freq == NULL)
 		return 0;
-	if(ia32_cg_config.label_alignment_factor <= 0)
+	if (ia32_cg_config.label_alignment_factor <= 0)
 		return 0;
 
 	block_freq = get_block_execfreq(exec_freq, block);
-	if(block_freq < DELTA)
+	if (block_freq < DELTA)
 		return 0;
 
 	n_cfgpreds = get_Block_n_cfgpreds(block);
 	for(i = 0; i < n_cfgpreds; ++i) {
-		ir_node *pred      = get_Block_cfgpred_block(block, i);
-		double   pred_freq = get_block_execfreq(exec_freq, pred);
+		const ir_node *pred      = get_Block_cfgpred_block(block, i);
+		double         pred_freq = get_block_execfreq(exec_freq, pred);
 
-		if(pred == prev) {
+		if (pred == prev) {
 			prev_freq += pred_freq;
 		} else {
 			jmp_freq  += pred_freq;
 		}
 	}
 
-	if(prev_freq < DELTA && !(jmp_freq < DELTA))
+	if (prev_freq < DELTA && !(jmp_freq < DELTA))
 		return 1;
 
 	jmp_freq /= prev_freq;
@@ -2039,8 +1975,7 @@ static int should_align_block(const ir_node *block)
 static void ia32_emit_block_header(ir_node *block)
 {
 	ir_graph     *irg = current_ir_graph;
-	int           n_cfgpreds;
-	bool          need_label = block_needs_label(block);
+	int           need_label = block_needs_label(block);
 	int           i, arity;
 	ir_exec_freq *exec_freq = cg->birg->exec_freq;
 
@@ -2057,13 +1992,13 @@ static void ia32_emit_block_header(ir_node *block)
 		} else {
 			/* if the predecessor block has no fall-through,
 			   we can always align the label. */
-			int      i;
-			bool     has_fallthrough = false;;
+			int i;
+			int has_fallthrough = 0;
 
-			for (i = n_cfgpreds - 1; i >= 0; --i) {
+			for (i = get_Block_n_cfgpreds(block) - 1; i >= 0; --i) {
 				ir_node *cfg_pred = get_Block_cfgpred(block, i);
 				if (can_be_fallthrough(cfg_pred)) {
-					has_fallthrough = true;
+					has_fallthrough = 1;
 					break;
 				}
 			}
@@ -2150,29 +2085,11 @@ static void ia32_gen_labels(ir_node *block, void *data)
 	}
 }
 
-/**
- * Assign and emit an exception label if the current instruction can fail.
- */
-void ia32_assign_exc_label(ir_node *node)
-{
-	if (get_ia32_exc_label(node)) {
-		/* assign a new ID to the instruction */
-		set_ia32_exc_label_id(node, ++exc_label_id);
-		/* print it */
-		ia32_emit_exc_label(node);
-		be_emit_char(':');
-		be_emit_pad_comment();
-		be_emit_cstring("/* exception to Block ");
-		ia32_emit_cfop_target(node);
-		be_emit_cstring(" */\n");
-		be_emit_write_line();
-	}
-}
-
 /**
  * Compare two exception_entries.
  */
-static int cmp_exc_entry(const void *a, const void *b) {
+static int cmp_exc_entry(const void *a, const void *b)
+{
 	const exc_entry *ea = a;
 	const exc_entry *eb = b;
 
@@ -2191,8 +2108,7 @@ void ia32_gen_routine(ia32_code_gen_t *ia32_cg, ir_graph *irg)
 	int i, n;
 
 	cg       = ia32_cg;
-	isa      = (const ia32_isa_t*) cg->arch_env;
-	arch_env = cg->arch_env;
+	isa      = cg->isa;
 	do_pic   = cg->birg->main_env->options->pic;
 
 	ia32_register_emitters();
@@ -2203,7 +2119,7 @@ void ia32_gen_routine(ia32_code_gen_t *ia32_cg, ir_graph *irg)
 	be_gas_emit_function_prolog(entity, ia32_cg_config.function_alignment);
 
 	/* we use links to point to target blocks */
-	set_using_irn_link(irg);
+	ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK);
 	irg_block_walk_graph(irg, ia32_gen_labels, NULL, &exc_list);
 
 	/* initialize next block links */
@@ -2226,7 +2142,7 @@ void ia32_gen_routine(ia32_code_gen_t *ia32_cg, ir_graph *irg)
 	be_emit_char('\n');
 	be_emit_write_line();
 
-	clear_using_irn_link(irg);
+	ir_free_resources(irg, IR_RESOURCE_IRN_LINK);
 
 	/* Sort the exception table using the exception label id's.
 	   Those are ascending with ascending addresses. */
@@ -2246,7 +2162,20 @@ void ia32_gen_routine(ia32_code_gen_t *ia32_cg, ir_graph *irg)
 	DEL_ARR_F(exc_list);
 }
 
+static const lc_opt_table_entry_t ia32_emitter_options[] = {
+	LC_OPT_ENT_BOOL("mark_spill_reload",   "mark spills and reloads with ud opcodes", &mark_spill_reload),
+	LC_OPT_LAST
+};
+
 void ia32_init_emitter(void)
 {
+	lc_opt_entry_t *be_grp;
+	lc_opt_entry_t *ia32_grp;
+
+	be_grp   = lc_opt_get_grp(firm_opt_get_root(), "be");
+	ia32_grp = lc_opt_get_grp(be_grp, "ia32");
+
+	lc_opt_add_table(ia32_grp, ia32_emitter_options);
+
 	FIRM_DBG_REGISTER(dbg, "firm.be.ia32.emitter");
 }